Acicular ferrite microstructure in micro-alloyed steels, which nucleates around non-metallic inclusions, especially oxide inclusions, has high strength and good toughness and possesses strong grain-refining ability by itself. The ultra-fine grained steel with excellent weldability is likely to be produced by forming in materials a great number of fine and dispersive micro-inclusions which is helpful to induce AF to nucleate around them through oxide metallurgy technology.

微合金鋼針狀鐵素體組織強(qiáng)度高只久久久久久久久久久、韌性好，在奧氏體晶內(nèi)非金屬夾雜物上誘導(dǎo)形核，具有很強(qiáng)的自身細(xì)化晶粒的能力日韩中文激情无码迅雷下载，通過氧化物冶金技術(shù)控制鋼鐵材料形成大量細(xì)小、彌散古代一级婬片A片AAA毛片中文，具有誘導(dǎo)AF形核能力的有益微夾雜物美女裸体黄网站18禁无遮挡，有望獲得焊接性能優(yōu)良的超細(xì)晶粒鋼。

Compared with conventional quenched and tempered process, Direct quenching eliminated off-line reheating and quenching, reduced processing costs and shortened process, in addition, DQ process increase hardenability ,weldability, and mechanical balance by reducing alloy elements.

本文以工業(yè)生產(chǎn)的轉(zhuǎn)爐連鑄22SiMn2TiB鋼為研究對(duì)象日韩国产欧美精品，以實(shí)驗(yàn)室熱軋實(shí)驗(yàn)為主要研究手段精品福利在线视频，對(duì)直接淬火工藝在不同軋制條件下對(duì)鋼板微觀組織與力學(xué)性能的影響進(jìn)行了研究，同時(shí)與再加熱淬火工藝進(jìn)行了比較精品日韩手机版视频在线观看，探討了此類鋼在低溫回火下提高強(qiáng)韌性的可能性和直接淬火工藝的機(jī)理天天日天天色天天干。

This paper, based on structure of axle case of three parts and the analysis of its weldability, confirms welding technology for the girth weld s of axle case in order to keep its weld quality.

本文根據(jù)三段式橋殼結(jié)構(gòu)人人揉人人操人人爽，通過焊接工藝性分析。確定了橋殼環(huán)縫焊接工藝久久这里只有欧美精品，保證橋殼質(zhì)量75性交欧美色色。

The weldability, deposited metals mechanical properties and purity of the new developed shell butt welding SAW material as the same level compared with Kobe Steel US-521HD/PF-500D.

研制的容器主焊縫埋弧焊材與國(guó)外典型的埋弧焊焊材在焊接工藝性能和熔敷金屬力學(xué)性能及純凈度方面對(duì)比，結(jié)果表明研制焊材與日本神戶制鋼所的US-521HD／PF-500D焊材相當(dāng)午夜级小电影。

The article includes the research about hot-dip aluminized steel s weldability by applying different kinds of welding methods, such as fusion welding and resis...

研究指出：由于熱浸鍍鋁鋼表面鍍鋁層的存在美女露出奶头18奶水喷高潮网站，給焊接造成一定的困難，但通過選擇合理的焊接材料和嚴(yán)格的焊接工藝自拍99页，可以達(dá)到滿意的焊接效果欧美熟妇淫乱。

Excellent gas cutting property and weldability.

優(yōu)異的焊接性和切割性。

In this paper, research on weldability between TiAl intermetallics and 42CrMo alloy steel has been performed, in which interlays is Ti-based alloy.

對(duì)TiAl金屬間化合物與 4 2CrMo鋼進(jìn)行了真空擴(kuò)散連接a视频免费在线观看。

The conclusion is that there is enough diffusion reaction between base material and interlays, vacuum diffusion bonding weldability of TiAl and 42CrMo is good.

研究發(fā)現(xiàn)最新无码不卡手机在线视频播放网站，母材與中間層發(fā)生了擴(kuò)散反應(yīng)，采用加入中間層的真空擴(kuò)散連接TiAl金屬間化合物與 4 2CrMo鋼具有良好的可焊性www欧美A片。

Even though 7075 aluminum alloy with worse weldability, the value of the tensile strength of it's joint with filler powder was 360Mpa and was as 78% value as that of the base metal.

焊縫強(qiáng)度較未填粉時(shí)有大幅度提高一级古装A片，達(dá)到了母材的78%。標(biāo)簽鋁合金激光焊接填充粉末接頭強(qiáng)度 aluminum alloy laser welding filler powder tensile strength of welding joint

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